The Signature of the Negative Curvature of the Universe in CMB Maps

Details The Signature of the Negative Curvature of the Universe in CMB Maps The Signature of the Negative Curvature of the Universe in CMB Maps

1997-11-07

arxiv.org/abs/astro-ph/9711063v1

Astronomy and Astrophysics

Astrophysics

Talk given at VIII Marcel Grossmann Meeting (Jerusalem, 1997); to appear in proceedings; Latex 4 pages

Scientific paper

The geodesics followed by cosmic microwave background (CMB) photons show different behaviours depending on the geometry of space. Namely, the effect of `mixing geodesics' predicts a distinct signature in CMB maps: threshold-independent elongated anisotropy spots in negatively curved geometries. We have found statistically significant sign for spot elongation in the COBE four year maps. This can be a direct indication for the negative curvature of the Universe.

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